Photo printing-frame.



' Gui W R. ROBINSON.

PHOTO PRINTING FRAME.

APPLICATION FILED JAN. 22, 1910.

1,030,540. Patented June 25, 1912.

2 SHEETS-SHEET 1.

R. ROBINSON.

PHOTO PRINTING FRAME.

APPLIOATION FILED JAN.22,1910.

4 Patented June 25, 1912.

2 SHEETSSHEBT 2.

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' iQ /I JI I! ypll Zjm NU LZLHH I ROY ROBINSON, OF PORTLAND, OREGON.

PHOTO PRINTING-FRAME.

Specification of Letters Patent.

Patented June 25, 1912.

Application filed January 22, 1910. Serial N 0. 539,608.

To all whom it may concern:

Be it known that I, Roy ROBINSON, a citizen of the United States, and aresident of Portland, in the county of Multnomah and State of Oregon,have invented a new and useful Improvement in Photo Printing- Frames, ofwhich the following is a specification,.reference being had to theaccompanying drawings, constituting a partthereof.

This invention has for its object to provide a printing frame adaptedfor making transfer prints on metal sheets for photo engraving work,also for making blue prints; and to this end my device comprises a framewhich is adjustable both in length and width, and embodies the featureshereinafter fully described.

In the drawings: Figure l is a perspective view of my printing frame,being on a larger scale than the remaining figures; Fig. 2 is a top viewthereof; Fig. 3 is a rightend view; Fig. 4: is an elevation of the adjustable intermediate supporting plate; and Fig. 5 is a detail ofconstruction of one of the arms provided on the ends of the two rollers,rotatably mounted in the ends of my frame, and providing means forstretching the base strip across the face of my frame, the ends of saidbase strip being secured in said rollers.

My printing frame comprises a fixed Vertical side plate a, a parallel,opposite side bar 6, and transverse tie rods or bars, 0, (Z, rigidlyconnecting the members a, Z). In the fixed side plate, a, are insertedthe near ends of two guide bars 6, f, preferably cylindrical. e, f, theside plate, a, is preferably made with bosses g. In the longitudinalends of the frame members, a, b, are rotatably mounted two rollers it,c. On the guide bars 6, f and the rollers it, i is mounted anintermediate vertical plate j (an elevation of which is shown in Fig.at), adjustable toward and from the fixed side member a. The members a,j are of the same shape; they constitute the supporting members for thework to be done on my printing frame; they are conveXed on arcs of equalradii, and their convexed faces are provided with a series of notches7c, Z, in which to removably receive supporting bars 772., a, 0. On thenear ends of each of the rollers, h, z', are mounted arms r, anelevation of one of which is shown in Fig. 5. Each arm comprises a con-Tn order to rigidly hold said guide bars caved portion 8, a splitcollar-portion 2, provided with ears u and a clamping screw '0, and aweb 10 being provided to stiffen the concaved member s. For convenienceI prefer to adapt each of the rollers, 71, i, to be rotated. The sidemember, a, is provided on its outer face with rotatable journal pins 01,on each of which is rigidly mounted a cam arm 2 provided with a leverhandle 2. The rollers it, 2' are respectively provided with slits it,2', said slits being shown in Figs. 1 and 3, and the purpose thereof isto receive the ends of the celluloid sheet, not shown, but which inpractice is laid over the work.

My device is designed for transferring a printing face from a negativeonto a metal sheet. Vhen so used the metal sheet is laid across theconvexed face of my frame; the adjustable supporting bars 772-, a and0or two thereof, if only two are necessaryhaving previously beenproperly arranged in accordance with the length of the work, and theadjustable plate 7' in accordance with the width of the work. After theends of the celluloid sheet have been inserted in the slits it, 2" ofthe rollers h, by then lifting one, or preferably both, of the arms 2the cam arms 3/ will bear against the concaved faces 8 of the arms 1',thus rotating the rollers h, 2', and winding up the ends of thecelluloid sheet and stretching it across the frame. The work of makingthe transfer onto the metal sheet is then finished in the Well knownmanner.

By reason of the described arrangementof the arms 1 and the cam arms 1,the stretching of the overlying transparent flexible sheet is readilyand conveniently accomplished. The arms 7 are provided with thedescribed split clamping collars 6, so that the rollers 7t may beproperly arranged relative to the length of the celluloid sheet and soas to enable the described stretching devices to properly perform theirfunction.

The notches j at the base of the intermediate member j are provided forthe tie bars 0, (Z, the holes j for the ends of the guide bars 6, f, andthe semi-circular cut-out places j are provided for the rollers h, i.

I claim:

1. A printing frame comprising a fixed side plate and an opposite sidebar; transverse bars connecting the front and rear sides; rollers in theends of the frame, one of said rollers being rotatable, and such rollersbeing provided with means for fastening the ends of a sheet thereon; anintermediate adjustable plate and guiding means therefor, the top facesof said fixed side plate, and the intermediate plate being convexed onarcs of equal radii, for the purpose specified; and means for rotatingone roller. "2. A printing frame comprising a fixed side plate and anopposite side bar; transverse bars connecting the front and rear sides;rollers in the ends of the frame, one of said rollers being rotatable,and such rollers being provided with means for fastening the ends of asheet thereon; an intermediate adjustable plate and guiding meanstherefor, the top faces of said fixed side plate, and the intermediateplate being convexed on arcs of equal radii, for the purpose specified;and an arm on said rotatable roller.

3. A printing frame comprising a fixed side plate and an opposite sidebar; transverse bars connecting the front and rear sides; rollers in theends of the frame, one of said rollers being rotatable, and such rollersbeing provided With means for fastening the ends of a sheet thereon; anintermediate adjustable plate and guiding means therefor, the top facesof said fixed side plate, and the intermediate plate being convexed onarcs of equal radii, for the purpose specified; and an arm on saidrotatable roller, such arm provided with a concaved bottom face.

at. A printing frame comprising a fixed side plate and an opposite sidebar; transverse bars connecting the front and rear sides; rollers in theends of the frame, one of said rollers being rotatable, and such rollersbeing provided with means for fastening the ends of a sheet thereon; anintermediate adjustable plate and guiding means therefor, the top facesof said fixed side plate, and the intermediate plate being convexed onarcs of equal radii, for the purpose specified; an arm-on said rotatableroller; said arm being circumferentially adjustable on said rotatableroller and provided with a concaved bottom face; and a pivoted cam armand lever, said cam arm being adapted to engage with said concavedbottom face of the arm on said roller.

5. A printing frame comprising a fixed side plate and an opposite sidebar; transverse bars connecting the front and rear sides; rollers in theends of the frame, one of said rollers being rotatable, and such rollersbeing provided with means for fastening the ends of a sheet thereon; anintermediate adjustable plate and guiding means therefor, the top facesof said fixed side ferentially adjustable on one end plate and theintermediate plate being convexed on arcs of equal radii, for thepurpose specified; roller; said arm including a split clamping collar bywhich it is fixed circumferentially adjustable on one end of saidrotatable roller; and a pivoted cam arm and lever,

said cam arm being adapted to engage with said roller arm.

6. A prmtmg frame comprismg a fixed side plate and an opposite side bar;transverse bars connecting the front and rear sides; rollers in the endsof the frame, one of said rollers being rotatable, and such rollersbeing provlded w1th means for fastening the ends of a sheet thereon; anintermediate adjustable plate and guiding-means therefor, the top facesof said fixed side plate, and the intermediate plate being convexed onarcs of equal radii, for the purpose specified;

an arm on said rotatable roller, such arm provided with a concavedbottom face; said arm including a split clamping collar by which it isfixed circumof said rotatable roller; and a pivoted cam arm and lever,said cam arm being adapted to envvith said concaved bottom face of thearm on said roller.

7. A printing frame comprising a fixed side plate and an opposite sidebar; transverse bars connecting the front and rear sides: slittedrollers in the ends of the frame, one of said rollers being rotatable;an intermediate adjustable plate and guiding means therefor, the topfaces of said fixed side plate and the intermediate plate being convexedon arcs of equal radii, for the purpose specified; and means forrotating one roller.

8. A printing frame comprising a fixed side plate and an opposite sidebar; transverse bars connecting the front and rear sides; slittedrollers in the ends of the frame.

one of said rollers being rotatable; an intermediate ad ustable plateand guiding means therefor, the top faces of said fixed side plate andthe intermediate plate being convexed on arcs of equal radii, for thepurpose specified; an arm on said rotatable roller; said arm beingcircumferentially adjustable on said rotatable roller and provided witha concaved bottom face; and a pivoted cam arm and lever, said cam armbeing adaptedto engage with said roller arm.

ROY ROBINSON.

lVitnesses RALPH R. DUNIWAY, CECIL Lone.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatents, Washington, D. C.

an arm on said rotatable

